Pump



July 11, 1933. c, G, BRANSTRATQR 3,91%821 PUMP Filed Oct. 19, 1931 Fig].

INVENTOR ATTORNI- IY Patented July 11, 1933 i a 1,917,821

UNITED STATES .PArsu-"r orsrcs CLEMENT G. BRANSTRATQR, 01 FORT WAYNE, INDIANA PUMP Application filed October 19, 1931. Serial No. 569,561.

This invention relates to improvements communication with an outlet pipe 19 in pumps of that type employed for elevatthrough a duct 20'n1ade in said castingwhich ing water from wells and especially wherein also has connection therewith. a gear pump is actuated by means of a motor. The lower end of the pedestal casting has One of the objects of the invention is to an annular flange 21 that fits over the'top of provide a pump adapted to be operated while the well tube 3 and has a set-screw 22 theresubmerged in a well tube so constructed as to in for securing the pedestal casting in posibe operated for a considerable period oftime tion thereon; The upper end of the pedestal without necessitating frequent removal from casting constitutes the lower head ofamotor H m the well tube for lubrication or repair. 23 positioned thereon, the axis ofsaid lower Other objects and advantages of the invenhead being offset with respect to that of the tion will appear hereinafter. well tube so that when the pump casing is An illustrative embodiment ofthe invenpositioned in the well tube iniaxial alinement tion is shown in the accompanying drawing, therewith the armature shaft 24: of themotor 5 in which I is disposed in alinement with the trunnion 1O Fig. 1 is an elevation of a structure in on the pump gear 4. The armature shaft 24 which the invention is embodied, portions has operative relation with the pump gear a thereof being broken away; by means of a line-shaft 25, the upper end Fig. 2 is a plan view of the gear pump upon of which is connected with the armature an enlarged scale; and Fig. Sis a plan View shaft by a couphng 26 and at its lower end of a centering devicefor the co-uplingshaft w th the extension 13 by a slip socket conthat connects the motor with the pump, the nection 27 well tube being included and shown in sec- The pedestal casting .18 has a transverse tion. V partition 28 therein in which is supported The illustrative embodiment of the invena thrust bearing 29 through which the armation consists essentially of a gear P1111113 l ture shaft 24t fiXtGIlClS and by which dOWIh having a discharge pipe 2 extending from its ward movement of the armature shaft is pretop and by which it is supported pendently Vented. The length of the line shaft 25 relain a well tube 3. tive to the discharge pipe 2 uponwhichthe v 39 The pump 1 is of the gear type having pump is solely supported, and the longitudi- S9 gears 4 and 5 in a casing 6 provided with nal play of the extension 13 in the slip socket bores 77 and 8 respectively therefor and in 27 on the drive-shaft, are such as to obviate which the said gears rotate oppositely. The vertical thrust of said line shaft and its slip gear a has trunnions 9 and 10 extending res coupling upon the trunnion 10 of the gear. Y spectively from its ends entirely through the Thus, it will be understood that the weight corresponding heads 11 and 12 for the casof the line shaft 25 as well as the armature ing 6, and the trunnion 1-0 has a polygonal shaft connected therewith is entirely borne extension 13. The gear 5 also has trunnions by the thrust bearing 29. 1 14; that respectively extend entirely through For the purpose of sustaining the discharge 40 the heads Hand 12. i pipe 2 and the line shaft 25 respectively in The head 12 on the lower end of the casing proper eccentric alinement with respect to 6 has a suction chamber 15 that has communithe axial center of the pump tube 3 there is cation with an inlet port 16, and also said provided one or more supports therefor, each casing has therein an outletchamber 17 that constituting a disc 30 having secured therehas communication with the discharge pipe "on a clamp 31 in which is disposed a bushing 2 through the head 11 in which said pipe has 32 through which the line shaft extends and threaded connection. is 'revoluble therein, and which is firmly se- The upper end of the discharge pipe 2 is cured in place upon the discharge pipe 2 by suspended from a pedestal casting 18 that. means of a bolt 33. Such supports (one only surmounts the top of the well tube 3 and has being shown) are disposed in the well tube at points suitably spaced apart to prevent buckling of the line shaft.

Preferably, the outlet pipe 19 has an extension connected therewith constitutmg a service pipe 34: provided with a valve 35, and

also connected with said outlet pipe is pro-.

vided a pressure controlled switch 36 of ordinary construction through which current is supplied to the motor through suitable conductors 37, whereby when the pressure developed in the outlet pipe through operation of the pump becomes excessive, the current sififpplied to the motor is automatically shut o A feature of the invention is in forming the pedestal casting so that when positioned upon the top of the well tube 8 the armature shaft 24:, line shaft 25 and the trunnion 10 for the gear 4 are sustained in alinement with each other and the pump casing 1 while sup ported by the discharge pipe 2 is sustained in axial alinenient with the pipe 2.

Another feature of the invention is the arrangement of ducts 38 and 39 made respectively in the heads 11 and 12 of the pump, that extend from the outlet chamber 17 inwardly toa point spacedfrom the axial center of the pump. and through which escapes into the outlet chamber liquid entrapped between the teeth of the gears from the discharge sides thereof, thus relieving unnecessary pressure of liquid between the gears.

A further feature of the invention consists in so proportioning the trunnions 9 and 10 of the gear 4 and the trunnions 14 of the gear 5 relative to the openings in the heads through which they extend by making said trunnions of slightly smaller diameter than said openings whereby a sufficient quantity of liquid as it is forced through the pump escapes outwardly between the trunnions and the walls of the openings in which they revolve. Such passage of liquid is found to act as a lubricating means for the trunnions and obviates the necessity of a stufiing box for the trunnion 10 but is not sufficient in quantity to cause more than a negligible reduction of pressure within the pump while in operation.

If so desired a check valve 10 may be connected in the discharge pipe at a suitable point whereby back-flow of water through the pipe is obviated when the pump is idle.

In operation, the structure consisting bodily of the motor, pedestal casting, supports 30, pump, discharge pipe and the driving connection between the motor and the pump is placed upon the top of the well tube 3with the bottom of the pedestal resting on the top thereof and secured in place by the the motor causing flow of water through ,the discharge pipe 2, outlet pipe 19 and the service pipe 34;. When. the flow of water is checked or stopped, as by closing the valve 35 the increased pressure of water in the discharge line, due to continued action of the pump, causes the switch to open and thus shut off the current from the motor. When the valve is reopened and the pressure in the discharge line is relieved the switch automatically closes and'operation of the apparatus is resumed.

I claim 1. A pumping mechanism consisting of a pedestal adapted to seat upon a well tube, a gear pump having a discharge pipe pendent-- ly connecting it with said pedestal, a motor mounted upon said pedestal the armature shaft of which is alined with one of the gears of said pump, a line shaft connecting said armature shaft with the said gear,'and a supporting means secured to said discharge pipe and having a-bearing through which said line shaft extends and rotates and adapted 'to fit within said well tube whereby said lineshaft is sustained in proper alinement between the motor and said pump gear.

2. In pumping mechanism, a well tube, a pedestal on the top of said tube, a gear pump and complemental discharge pipe pendently disposed in said tube, driving means on the pedestal having an actuating connection with one of the gears of said pump, and trunnions on the gears of said pump that extend through corresponding openings in the pump housing, said openings and trunnions being so disposed as to permit continuous passage from said housing through said openings about the trunnions and into the well tube of a limited amount. of liquid whereby said trunnions are lubricated.

In testimony whereof I afiix my signature.

CLEMENT G. BRANSTRATOR. 

